Networking/IPv6
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Features and Limitations
The snom 3xx phones are using the 2.4.xx Linux Kernel with the built-in IPv6 implementation.
Currently, there is no support for DHCPv6. The phone can deal only with one IPv6 address (except the loopback device ::1).
If the phone runs in IPv6 mode, then the whole phone must use IPv6. That means that also other protocols like HTTP, TFTP or DNS must be run over IPv6. When using DNS, the phone only queries DNS NAPTR, DNS SRV and DNS AAAA records. DNS A records are not requested.
The phone can be still run IPv4, but in this mode it will only use IPv4 for TCP/IP communications.
When running in IPv6 mode, there is no multicast detection of the provisioning server. Also, the phone does not listen to multicast RTP streams.
There is no VPN available when running in IPv6 mode (snom 370).
Apart from these limitations, all other features of the phone should also work in IPv6, including SRTP, TLS and all other call functions.
Required Firmware
The IPv6 support is available for all models of the 3xx series, including snom 300, 320, 360 and 370.
Currently, there is a special build required for the snom 3xx phones to run IPv6. You can regularly update from a 7.1 image to this version.
The firmware is available on demand.
Using IPv6
In order to use the IPv6 mode, you need to go to the advanced settings and turn the DHCP flag off. You must enter the IPv6 address of the phone; the netmask must remain empty.
You should also specify the address of an IPv6-enabled DNS server. The phone will use this server for requesting DNS entries.
After saving the setting, you must reboot the device.
Interoperability
So far, the interoperability of the IPv6 implementation has been shown with Asterisk-based (see http://www.asteriskv6.org) systems and pbxnsip (http://www.pbxnsip.com/ipv6).
